Ah, not a stupid question at all. Cell reception in my area of NJ is good offshore to about 15 miles + or -, and I do coastal boating primarily, so if I ventured out past cell reception, then I would use the Garmin GPS. You can't see it in the photos, but I have a mount for the Garmin above and to the left of the tablet on the dash. The GPS in the tablet does work without a cell phone contract, so I did not add the tablet to my cell phone subscription with my (Verizon) carrier. So it might work farther offshore, but I can't tell for sure, as I have not tested its range yet.
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